<template>
	<div>
		<div class="user-info-head" @click="editCropper()"><img v-bind:src="options.img" title="点击上传头像" class="img-circle img-lg" /></div>
		<el-dialog :title="title" :visible.sync="open" width="800px" append-to-body @opened="modalOpened" @close="closeDialog">
			<el-row>
				<el-col :xs="24" :md="12" :style="{ height: '350px' }">
					<vue-cropper
						ref="cropper"
						:img="options.img"
						:info="true"
						:autoCrop="options.autoCrop"
						:autoCropWidth="options.autoCropWidth"
						:autoCropHeight="options.autoCropHeight"
						:fixedBox="options.fixedBox"
						:outputType="options.outputType"
						@realTime="realTime"
						v-if="visible"
					/>
				</el-col>
				<el-col :xs="24" :md="12" :style="{ height: '350px' }">
					<div class="avatar-upload-preview">
						<img :src="previews.url" :style="previews.img" />
					</div>
				</el-col>
			</el-row>
			<br />
			<el-row>
				<el-col :lg="2" :sm="3" :xs="3">
					<el-upload action="#" :http-request="requestUpload" :show-file-list="false" :before-upload="beforeUpload">
						<el-button size="small">
							选择
							<i class="el-icon-upload el-icon--right"></i>
						</el-button>
					</el-upload>
				</el-col>
				<el-col :lg="{ span: 1, offset: 2 }" :sm="2" :xs="2">
					<el-button icon="el-icon-plus" size="small" @click="changeScale(1)"></el-button>
				</el-col>
				<el-col :lg="{ span: 1, offset: 1 }" :sm="2" :xs="2">
					<el-button icon="el-icon-minus" size="small" @click="changeScale(-1)"></el-button>
				</el-col>
				<el-col :lg="{ span: 1, offset: 1 }" :sm="2" :xs="2">
					<el-button icon="el-icon-refresh-left" size="small" @click="rotateLeft()"></el-button>
				</el-col>
				<el-col :lg="{ span: 1, offset: 1 }" :sm="2" :xs="2">
					<el-button icon="el-icon-refresh-right" size="small" @click="rotateRight()"></el-button>
				</el-col>
				<el-col :lg="{ span: 2, offset: 6 }" :sm="2" :xs="2">
					<el-button type="primary" size="small" @click="uploadImg()">提 交</el-button>
				</el-col>
			</el-row>
		</el-dialog>
	</div>
</template>

<script>
import store from '@/store';
import { VueCropper } from 'vue-cropper';
import { uploadAvatar } from '@/api/system/user';
import { debounce } from '@/utils';

export default {
	components: { VueCropper },
	data() {
		return {
			// 是否显示弹出层
			open: false,
			// 是否显示cropper
			visible: false,
			// 弹出层标题
			title: '修改头像',
			options: {
				img: store.getters.avatar, //裁剪图片的地址
				autoCrop: true, // 是否默认生成截图框
				autoCropWidth: 200, // 默认生成截图框宽度
				autoCropHeight: 200, // 默认生成截图框高度
				fixedBox: true, // 固定截图框大小 不允许改变
				outputType: 'png', // 默认生成截图为PNG格式
				filename: 'avatar', // 文件名称
			},
			previews: {},
			resizeHandler: null,
		};
	},
	methods: {
		// 编辑头像
		editCropper() {
			this.open = true;
		},
		// 打开弹出层结束时的回调
		modalOpened() {
			this.visible = true;
			if (!this.resizeHandler) {
				this.resizeHandler = debounce(() => {
					this.refresh();
				}, 100);
			}
			window.addEventListener('resize', this.resizeHandler);
		},
		// 刷新组件
		refresh() {
			this.$refs.cropper.refresh();
		},
		// 覆盖默认的上传行为
		requestUpload() {},
		// 向左旋转
		rotateLeft() {
			this.$refs.cropper.rotateLeft();
		},
		// 向右旋转
		rotateRight() {
			this.$refs.cropper.rotateRight();
		},
		// 图片缩放
		changeScale(num) {
			num = num || 1;
			this.$refs.cropper.changeScale(num);
		},
		// 上传预处理
		beforeUpload(file) {
			if (file.type.indexOf('image/') == -1) {
				this.$modal.msgError('文件格式错误，请上传图片类型,如：JPG，PNG后缀的文件。');
			} else {
				const reader = new FileReader();
				reader.readAsDataURL(file);
				reader.onload = () => {
					this.options.img = reader.result;
					this.options.filename = file.name;
				};
			}
		},
		// 上传图片
		uploadImg() {
			this.$refs.cropper.getCropBlob((data) => {
				let formData = new FormData();
				formData.append('avatarfile', data, this.options.filename);
				uploadAvatar(formData).then((response) => {
					this.open = false;
					this.options.img = process.env.VUE_APP_BASE_API + response.imgUrl;
					store.commit('SET_AVATAR', this.options.img);
					this.$modal.msgSuccess('修改成功');
					this.visible = false;
				});
			});
		},
		// 实时预览
		realTime(data) {
			this.previews = data;
		},
		// 关闭窗口
		closeDialog() {
			this.options.img = store.getters.avatar;
			this.visible = false;
			window.removeEventListener('resize', this.resizeHandler);
		},
	},
};
</script>
<style scoped lang="scss">
.user-info-head {
	position: relative;
	display: inline-block;
	height: 120px;
}

.user-info-head:hover:after {
	content: '+';
	position: absolute;
	left: 0;
	right: 0;
	top: 0;
	bottom: 0;
	color: #eee;
	background: rgba(0, 0, 0, 0.5);
	font-size: 24px;
	font-style: normal;
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
	cursor: pointer;
	line-height: 110px;
	border-radius: 50%;
}
</style>
